Add unit test to test to ensure `_.groupBy` only adds elements to own, not inherited, properties of the `result` object.
Add unit test to test to ensure `_.groupBy` only adds elements to own, not inherited, properties of the `result` object.


Former-commit-id: 61dcdd0f6172db66d62e97873c1bc3053e339342
dgoncalves1/lodash,krrg/lodash,IveWong/lodash,lekkas/lodash,timruffles/lodash,AneesMohammed/lodash,MaxPRafferty/lodash,steelsojka/lodash,zestia/lodash,BernhardRode/lodash,schnerd/lodash,MaxPRafferty/lodash,greyhwndz/lodash,beaugunderson/lodash,youprofit/lodash,r14r-work/fork_javascript_lodash,lekoaf/lodash,developer-prosenjit/lodash,felixshu/lodash,jshanson7/lodash,msmorgan/lodash,IveWong/lodash,af7/lodash,joshuaprior/lodash,mshoaibraja/lodash,rtorr/lodash,nsamarcos/lodash,stewx/lodash,bnicart/lodash,rlugojr/lodash,enng0227/lodash,dgoncalves1/lodash,greyhwndz/lodash,timruffles/lodash,greyhwndz/lodash,ajefremovs/lodash,Jaspersoft/lodash,imjerrybao/lodash,tonyonodi/lodash,lekoaf/lodash,AndBicScadMedia/lodash,codydaig/lodash,gdi2290/lodash,jzning-martian/lodash,ajefremovs/lodash,Xotic750/lodash,krahman/lodash,lzheng571/lodash,zestia/lodash,tejokumar/lodash,naoina/lodash,andersonaguiar/lodash,javiosyc/lodash,therebelbeta/lodash,enng0227/lodash,r14r-work/fork_javascript_lodash,PhiLhoSoft/lodash,imjerrybao/lodash,javiosyc/lodash,dgoncalves1/lodash,huyinghuan/lodash,hafeez-syed/lodash,transGLUKator/lodash,AndBicScadMedia/lodash,joshuaprior/lodash,xixilive/lodash,stewx/lodash,krahman/lodash,r14r/fork_javascript_lodash,prawnsalad/lodash,tejokumar/lodash,AneesMohammed/lodash,Moykn/lodash,hitesh97/lodash,neouser99/lodash,Jaspersoft/lodash,andersonaguiar/lodash,IveWong/lodash,Andrey-Pavlov/lodash,r14r/fork_javascript_lodash,samuelbeek/lodash,af7/lodash,jasnell/lodash,ror/lodash,jshanson7/lodash,Xotic750/lodash,ricardohbin/lodash,schnerd/lodash,r14r/fork_javascript_lodash,reggi/lodash,therebelbeta/lodash,polarbird/lodash,Lottid/lodash,ricardohbin/lodash,hitesh97/lodash,nbellowe/lodash,bnicart/lodash,lzheng571/lodash,krahman/lodash,jasnell/lodash,rtorr/lodash,tquetano-r7/lodash,beaugunderson/lodash,zhangguangyong/lodash,boneskull/lodash,zestia/lodash,gutenye/lodash,chrootsu/lodash,timruffles/lodash,lekoaf/lodash,MaxPRafferty/lodash,Xotic750/lodash,chrootsu/lodash,huyinghuan/lodash,woldie/lodash,tquetano-r7/lodash,developer-prosenjit/lodash,rtorr/lodash,PhiLhoSoft/lodash,jacwright/lodash,andersonaguiar/lodash,reggi/lodash,Andrey-Pavlov/lodash,youprofit/lodash,Droogans/lodash,neouser99/lodash,bnicart/lodash,hafeez-syed/lodash,boneskull/lodash,woldie/lodash,xiwc/lodash,shwaydogg/lodash,codydaig/lodash,prawnsalad/lodash,huyinghuan/lodash,xiwc/lodash,jasnell/lodash,jzning-martian/lodash,nbellowe/lodash,steelsojka/lodash,mshoaibraja/lodash,mshoaibraja/lodash,ror/lodash,AneesMohammed/lodash,codydaig/lodash,tgriesser/lodash,Moykn/lodash,ajefremovs/lodash,studiowangfei/lodash,shwaydogg/lodash,zhangguangyong/lodash,samuelbeek/lodash,jzning-martian/lodash,tquetano-r7/lodash,justintung/lodash,hitesh97/lodash,leolin1229/lodash,studiowangfei/lodash,justintung/lodash,krrg/lodash,julianocomg/lodash,leolin1229/lodash,nsamarcos/lodash,julianocomg/lodash,rlugojr/lodash,naoina/lodash,javiosyc/lodash,jacwright/lodash,benweet/lodash,Droogans/lodash,jshanson7/lodash,af7/lodash,tejokumar/lodash,gdi2290/lodash,naoina/lodash,tonyonodi/lodash,neouser99/lodash,nbellowe/lodash,xixilive/lodash,polarbird/lodash,transGLUKator/lodash,leolin1229/lodash,ricardohbin/lodash,Andrey-Pavlov/lodash,felixshu/lodash,BernhardRode/lodash,studiowangfei/lodash,joshuaprior/lodash,transGLUKator/lodash,lekkas/lodash,benweet/lodash,felixshu/lodash,PhiLhoSoft/lodash,Droogans/lodash,polarbird/lodash,nsamarcos/lodash,msmorgan/lodash,tgriesser/lodash,mjosh954/lodash,mjosh954/lodash,lekkas/lodash,samuelbeek/lodash,chrootsu/lodash,schnerd/lodash,ror/lodash,stewx/lodash,Jaspersoft/lodash,zhangguangyong/lodash,mjosh954/lodash,AndBicScadMedia/lodash,reggi/lodash,developer-prosenjit/lodash,xixilive/lodash,shwaydogg/lodash,phillipalexander/lodash,benweet/lodash,gutenye/lodash,krrg/lodash,youprofit/lodash,hafeez-syed/lodash,BernhardRode/lodash,therebelbeta/lodash,prawnsalad/lodash,justintung/lodash,enng0227/lodash,phillipalexander/lodash,imjerrybao/lodash,Lottid/lodash,julianocomg/lodash,woldie/lodash,jacwright/lodash,phillipalexander/lodash,xiwc/lodash,Lottid/lodash,lzheng571/lodash,tgriesser/lodash,gutenye/lodash,r14r-work/fork_javascript_lodash,Moykn/lodash